Shawn Mendes Totally Called John Mayer 'Old Man!'

Shawn Mendes playfully called out John Mayer for being an “old man!”

After the “Gravity” singer posted a throwback pic of himself on Instagram, the “There’s Nothing Holdin’ Me Back” crooner wasted no time in commenting.

“#Tbt 1998,” John captioned the photo of himself posing with a guitar. “In it for life.”

“Year i was born old man @johnmayer,” Shawn remarked.

LOL.

The next day, John shared a black-and-white photo of Shawn sitting at a piano along with the caption, ‘🎹@shawnmendes 📷 ya boy.”

The two are good friends and big fans of each other in real life. Shawn even once referred to John as a “music god.”

Shawn also covered a few of John‘s songs before they teamed up on an epic mash-up performance.